Fastener-applying implement



y 1947" 3 A. H. MAYNARD 2,420,830

FASTENER-AYPPLYING IMPLEMENT Filed NOV. 15. v194:4 5 Sheetsi-Sheet l.Eazianibr flrlluzrHMqnard May 20, 1947. i A. H. MAYNARD 2,420,330.

FASTENER-APPLYING IMPLEMENT Filed Nov. .15, 1944 :5 Sheets-Sheet 2 ijgz2 2 .63

May 20, 1947. MAYNARD I 2,420,830

FASTENER-APPLYING IMPLEMENT Filed Nov. 15, 1944 5 Sheets-Sheet sPatented May 20, 1947 2,420,830 FASTENER-APPLYING lllIPLElWENT Arthur H.Maynard, Warwick, R. Boston Wire Stitcher Company,

a corporation of Maine Application November 15, 1944, Serial No. 563,499

14' Claims:

This invention relates to improvements in fastener-applying implementsfor attaching papers and other sheets, fastening tags to articles ofcommerce, and securing other articles to various objects.

One object of the invention is to simplify and improve the constructionof the device by avoiding the use of pins, rivets and screws, and torender the parts easier to assemble in manufacturing the implement andto disassemble them for repair or replacement.

Another object is to provide easier and more convenient means forloading the implement with a supply of fasteners.

Another object is to provide improved fastenerfeeding and driving meansfor preventing the driving of a. second fastened before the first onehas been discharged from the implement.

Another object is to provide improved means for feeding the fasteners tothe driving means and for retracting the feeding means when a supply offasteners is loaded in the implement.

Further objects of the improvement are set forth in the followingspecification which describes a preferred form of construction of theimplement, by way of example, as illustrated by the accompanyingdrawings.

In the drawings:

Fig. l is a side elevational view of the complete implement;

Fig. 2 is a longitudinal sectional view of the same;

Fig. 3 is a plan view of the magazine-arm for containing the fastenersor wire staples, showing the staple-feeding means in operative position;

Fig. 4 is a similar fragmentary plan view of the magazine-arm showingthe staple-feeding means as being retracted therein with the spring-armsof the staple-pusher sliding between the legs of the staples;

Fig. 5 is a transverse sectional view on line 55 of Fig. 1 showing therelation between the magazine-arm and staple-driving lever of theimplement;

Fig. 6 is a transverse sectional view 6-6 of Fig. 1;

Fig. 7 is a greatly enlarged longitudinal sectional view through theforward end Of themagazine-arm and the staple-driving lever showing theparts in position before a staple is driven;

Fig. 8 is a similar sectional view showing the parts in position at theend of the staple-driving operation with the staple illustrated asdriven into the work and clinched on its under side;

on line 1., assignor to Warwick, R. 1.,

Fig. 9 is a similar sectional view showing the staple-driving means aspartly returned to inoperative position with a staple retained inreserve position to be finally advanced beneath the staple-driver whenthe latter is withdrawn completely to its inoperative position;

Fig. 10 is a composite perspective view showing the several parts of theimplement in disassembled relationship; and

Fig. 11 is a fragmentary sectional view showing the rearward end of theimplement and illustrating the staple strip in the act of being insertedinto the magazine.

Referring first to Figs. 1 and 2 of the drawings, the present improvedfastener-applying implement comprises, in general, a base or support 2provided with a mounting 3 at its rearward end for pivotally supportinga magazine-arm 4 containing a supply of staples s; a fastener-applyinglever 5 pivoted to the magazine-arm 4; a stapledriver 6 at the forwardend of the lever 5; and staple-feeding means 1 within the magazine-arm 4for advancing the staples to deliver them individually to thestaple-driving means.

The base 2 may take any usual form but is preferably constructed fromsheet-metal struck up to provide a raised upper platform l0 bounded by alower marginal flange ll adapted to rest upon a desk or other suitablesupport, see Figs. 1 and 6. The forward end of the base 2 may be formedwith clincher-grooves l2 oiusual construction. The mounting 3 for themagazinearm 4, see Fig. 6, is also constructed of sheetmetal insubstantially U-shape and suitably fastened to the rearward end of thebase 2. For this latter purpose the base 2 is provided with suitableslots l3 through which the side walls M of the mounting 3 projectupwardly to form standards and with the bottom wall 15 welded orotherwise suitably fastened to the under side of the raised top plate IDof the base. As shown in Fig. 1, the upper portions of the side walls Mof the mounting 3 are recessed rearwardly at It in reversely curvedmarginal portions and at the rearward end the walls are formed withoverhanging terminal portions ll, see also Fig. 10. Rearwardly of theirrecessed portions the upright walls M are formed with lugs 20 bentinwardly at substantially right-angles and rounded on their under sidesat 2! to form pivots for mounting the magazine-arm 4.

As shown in Fig: 10, the magazine-arm 4 is preferably constructed ofsheet-metal in channel-shape with a bottom wall 22 and vertical sidewalls 23 joined at the front by an end wall 24,

The side walls 23 of the arm 4 are provided with a series of oblongopenings 39 spaced along its forward portion to provide windows forrevealing the staples in its interior to indicate when the supply isabout to be exhausted. At its rearward end the bottom wall 22 isextended and bent upwardly in a transverse wall 25 formed with acircular opening 25. The upper portions of the side walls 23 arerecessed adjacent their rearward ends with a pair of tapered notches 21adapted to engage the rounded under sides 2| of the lugs 20 to form apivotal joint between the arm 4 and the base 2. A leaf-spring 23, seeFig. 2, of substantially S-shape has its rearward portion secured to thebase 2 by means of a rivet 29 with its forward portion underlying thebottom wall 22 of the arm 4 to maintain the latter with its recessednotches 21 engaging the rounded under sides 2| of the lugs 25. By thisimproved form of construction the magazine-arm 4 is pivotally mountedabove the base 2 without the use of pins, screws or other addedelements, being adapted to rock downwardly against the resilientpressure of the spring 28.

At the forward end of the arm 4 its front wall 24 is formed at the topwith a pair of spaced lugs bent forwardly and rounded in beveled form ontheir under sides as shown most clearly in Fig. 10. The lugs 35 functionfor a purpose later explained. The opposite side walls 23 of the arm 6are formed with pairs of upstanding lugs 35 and 31 spaced at a distanceapart and designed for a purpose explained later. Rearwardly of the lugs31 is a pair of lugs 38 bent at right-angles to project outwardly fromthe side walls 23 and adapted to serve'as pivots for the staple-applyinglever 5.

Located between the side walls 23 of the arm 4 at its forward end is ahardened metal block 39 disposed with its forward flat face spaced fromthe inner face of the front wall 24 to provide a narrow throat 40through which the staples are driven, see Figs. 2, 3 and 10. The mainportion of the block 39 seats against the bottom wall 22 of the arm 5and at its forward end the block is formed with a depending portion 4|projecting through a lateral slot E2 in the bottom wall. A stud 43extends through a vertical bore 44 in the block 39 with its end screwedinto a tapped hole in the bottom wall 22 of the arm 4 to fasten theblock in place; the beveledhead of the stud being partly received in acounterbore at the top of the block. Preferably, a boss 48 is formed onthe bottom wall 22 projecting upwardly into the bore 44 in the block 39.The main portion of the block 39 is of a, width to adapt the legs of thestaples s to slide between its sides and the inner faces of the sidewalls '23 of the arm 4, but its lower depending portion AI is of greaterwidth, being dimensioned to entirely fill the space between the sidewalls. By this form of construction the block 39 is provided withoutwardly projecting portions at its forward lower end, these portionsbeing beveled off at 49 on the front to adapt the ends of the staplelegs to slide downwardly thereon with an easy action. The forward faceof the block 39 is recessed at the top to provide a transverse ledge e5constituting a rest for each staple prior to its being delivered to thestaple-driver in the manner to be explained hereinafter. Above the ledgethe forward face of the block 39 is formed with a substantially circularvertical opening or pocket '46 for holding a spring-latch 50 to bedescribed later. The rearward end of the block 39 is formed with acircular hole 41 for receiving the end of a rod which serves as themanually-operable means for retracting the staple-feeding device orpusher 1.

Overlying the top of the block 39 at its forward end and extendingrearwardly the full length of the arm 4 is a plate 50 which forms aplatform or rest for the staples s to adapt them to be fed therealong toth staple-driving means. The forward end of the plate 53 is providedwith a counterbored hole 6!, see Figs. 8 and 10, for receivin thetapered head of the stud 13 which secures the block 59 in place wherebythe stud serves to fasten the plate in position. The forward edge of theplate 65 is of slightly arcuate contour and at its center is arectangular notch 62 overlying the pocket 45 in the block 39. Therearward end of the plate 89 rests on the upstanding end wall 25 of thearm 5 and is formed with a downwardly-bent portion 63 provided with ahole 65 through which the rod 55 projects to anchor the plate at thisend. The plate 63 is formed with an upwardly-inclined lug $5 shearedfrom the metal and struck up to provide a detent-shouldcr at its forwardedge.

The rod 55 is slidable through the hole 64 in the down-turned portion 63of the plat 63 and the opening 26 in the end wall 24 of the arm l, beingprovided with a knurled end at 55 for convenience in grasping it. Itsforward end is rounded to adapt it to enter the hole 41 in the block 39with an easy action when the rod 55 is pushed forwardly. A relativelythin collar or washer 51 is riveted to this end of the rod 55 to form anannular flange which provides an abutment engaging the staple-pusher 1to retract it when the rod 55 is withdrawn.

The staple-feeding means or pusher 1 consists in a bifurcatedspring-element, see Figs. 4 and 10, comprising a cross-member 68 formedwith a central hole 69 to adapt it to slide longitudinally of th rod 55and provided with forwardly-projecting spring-arms 18 bent inwardlytoward each other at their ends to form terminal portions 15 forengaging with the legs of the rearmost staple in a series. Straddlingthe sides of the pusher 1 is a bifurcated yoke-element 12 formed with across-piece 13 bored with a central hole 14 for receiving the rod 55 andhaving opposite lateral arms 15 for straddling the rearward portion ofthe arms 10.

The pusher 1 is assembled on the rod 55 with the arms 15 of theyoke-membe 12 enclosing its sides to limit the outward swinging movementof the spring-arms 10. 'By this form of construction the yoke 12 acts toprevent the ends of the sprin arms 10 of the pusher from expanding tosuch an extent that they would dog against the sides of the arm 4 andprevent free movement of the pusher forwardly in th arm. Surrounding therod 55 at the rear of the pusher 1 is a helical spring 15 having itsrearward end bearing against the rearward wall 25 of the arm The spring16 thus is held unde compression whereby it tends to slide the pusher 1forwardly with its forward motion limited by the flange or washer 51 atthe forward end of the rod 55.

A relatively flat plate 11 is mounted on the arm 4 overlying thestaple-guide or rest 60 on which the staples are fed to the drivingmeans. The plate 11 is mounted in elevated relation to the rest 65 toprovide a space therebetwcen for free passage of the staples therealong,while serving as a guard to prevent the staples from rising up on therest. The plate 11 is formed with a relatively narrow projection 18 atits forward end and has a portion of reduced width at its rearward endcurved upwardly and knurled or corrugated on its surface to provide afinger-hold 8B. The plate or guard I1 seats on the upper edges of thesides 23 of the arm 4 and is held from longitudinal displacement by thelugs 36 and 31. The forward portion of the plate is narrowed at thesides to provide shoulders 8| abutting the edges of the lugs 36 andrearwardly thereof the plate is notched at 82 to receive the lugs 31,see Fig. 10. It will be noted by reference to Fig. 2 that an opening isprovided beneath the rolled extension 86 at the rearward end of theplate 11 for the insertion of the staples onto the rest or guideplate60.

The staple-driving lever 5, see Figs. 1, 2 and 10, is constructed ofsheet-metal in inverted channelshape with a top wall 84 and dependingsides 83. \At its forward end is a transverse wall connecting its sidewalls 83 which is cut away at its center, see Figs. 2 and 10, to formlateral portions 85 with an opening therebetween. The lower ends of thelateral portions 85 are bent inwardly to provide detents 86 for apurpose explained later. The upper portion of the front wall is shearedto form a narrow strip of the metal which is bent inwardly atright-angles to provide a lug 81 for connecting the staple-driver 6 withthe lever 5, see Fig. 2. At the rearward end of the lever its sides 83are cut away to conform to the curved contour at the top of the sidewalls 14 of the mounting 3. The rearward ends of the sides are formedwith substantially V-shaped notches 88 adjacent the top of the leverwhich are adapted to engage with the outwardly-projecting lugs 38 on thearm 4 to provide a pivotal connection between the lever and the arm.Referring to Fig. 10, a rectangular slot 89 is formed in the top wall ofthe lever 5 and the end of the wall is cut away with a Wider opening 9%at the rearward end of the lever. Surmounting the top of the lever 5 atits forward end is a hand-rest 9| having a convex upper face andrecessed on its other side to overlie the front and sides of the lever.The hand-rest ill may be constructed of Bakelite or other suitableplastic material and fastened in place on the top of the lever 5 bymeans of screws 92, shown in Fig. 2 of the drawings.

The staple-driver lever 5 is held in raised relation to the magazine-arm4 by means of a leafspring 93 of bowed shape having its rearward endnarrowed to provide a projection 96 for engagement within the slot 89 inthe top wall 84 of the lever; while its forward end is narrowed andcurved downwardly to engage underneath the top wall of the lever, seeFig. 2 The rearward end of the spring 93 is formed at its sides withslots 95 for engaging with the lugs 3'! on the sides of the arm 4.Attached to the under side of the spring es is an auxiliary leaf-spring96 fastened thereto by a rivet 9? and having its forward end curved tobear against the top of the plate or staple-guard ii. The auxiliaryspring 9% is of thinner material thanthe main spring 93 so that it willield more easily. The spring 93 acts to maintain the lever 5 in raisedposition above the magazine-arm while said arm is held elevated abovethe base 2 by the spring 28. During operation of the implement, however,when pressure is applied to the hand-rest 9! the relative greaterresistance of the main spring 93 will cause the arm 4 to be swungdownwardly against'the tension of the spring 28 until the forward end ofthe arm presses against the work; whereafter the sprin 83and auxiliaryspring 96 will yield to adapt the lever 5 to be moved downwardly towardthe arm 4 to operate the staple-driver 6 to apply a staple to the work.

The staple-driving lever 5 is assembled on the arm 4 with its V-shapednotches 88 engaging the outwardly-projecting lugs 38 on the sides of thearm and with the curled over end projection 89 of the late or guard 11passing through the cut-out opening '90 in the end of the top-wall 84 ofthe lever. With this connection between the parts the projection 94 onthe end of the spring 93 impinges against the edge of the slot oropening 89 in the top of the lever 5 to maintain the engagement betweenthe notches 88 and the lugs 38 on the arm 4. During the assembling ofthe parts the lever 5 is placed in position with its inwardly-bentdetent lugs 85 underlying the forwardly-projecting lugs on the arm 4whereby to limit the upward movement of the lever relative to the armunder the tension of the spring 85.

The staple-driver 6 consists in a relativel fia, hardened blade, shownmost clearly in Figs. 8 and 10, having its upper end bent at rightanglesto provide an overhanging ledge portion 98 adapted to hook over theinwardly-bent lug t! to mount the driver on the lever 5. The lowerportion of the staple-driver 6 is cut away to provide a blade se of lessthickness adapted to slide freely in the staple throat 40 formed by thespace between the forward wall 24 of the arm 4 and the forward face ofthe block 39. By this form of construction a relatively sharp shoulderor abutment Hill is provided on the rearward side of the staple-driver 6midway of its length, this shoulder forming a striking edge for engagingthe top of a staple to detach it from the strip or stick of staples inthe magazine-arm 4 and carry it downward onto the ledge to be eventuallyfed forward under the lower edge of the narrower blade-portion 95 of thedriver 6 after a previously fed staple has been driven into the work.Formed adjacent the center of the staple-driver 5 is a rectangularopening l0! adapted to receive and clear the forward projection 18 onthe stapleguard TI as the driver descends under the action of the lever5.

The spring seated in the pocket 45 at the forward end of the arm 4 actsas a means for holding a staple s severed from the strip in re serveposition on the ledge 45 of the block 39 before it is transferred intothe throat 40 to be driven at the next operation of the staple-driver.

The construction and arrangement of the parts of the implement havingbeen described in detail its method of operation is explained asfollows: With the parts of the implement in the positions shown in Fig.1 the magazine-arm 4 may be loaded with a supply of staples s byinserting them in under the guard l1 at the rear of the lever 5,

see Fig. 11, and sliding them forwardly on the plate or rest 60. Thisoperation may be performed while the staple-feeding means or pusher l isin its forward position abutting the collar 51 on the rod 55 or, inother instances, engaging the last few staples remaining in themagazinearm i. The staples are usually joined together in a stick orrefill and the stick will generally be of a length to underlie the guard11 and project slightl at the rear thereof so that the rearmost stapleis positioned in front of and engaging the detent 65.

It now becomes necessary to retract the staplepusher I to engage it inback of the legs of the rearmost staple in the series and this isaccomgrooves 12 in the base 2.

plished by simply drawing the rod '55 rearwardly by grasping its knurledend 56 in the fingers. Referring to Fig. 4, as the rod 55 is withdrawnthe collar 57 at its forward end will engage with the cross-member 58 ofthe bifurcated pusher 1 to retract the latter-within the magazine-arm 4.As the pusher I is retracted in this manner its arms ID will contractinwardly toward each other to permit their ends to pass between the legsof the several staples. The pusher 1 thus may be retracted readilythrough the whole series of staples in the stick until the inwardly-bentterminal portions H of its arms 70 spring outwardly to abut the legs ofthe rearmost staple in the series. It will be understood that the pusherl is retracted against the tension of its spring it by the withdrawal ofthe rod 55 and when its arms 10 have been engaged with the rearmoststaple s in the arm 4 the rod may be slid forwardly again to itsinoperative position shown in Fig. 2 and indicated by dotted lines inFig. 3.

With the staple-pusher 1 in engagement with the rearmost staple in theseries the spring 16 will tend to force the whole series of staplesforwardly whereby to feed them individually to the applying means. Aswill be observed by reference to Fig. '7, the lower edge of thestaple-driver 6 is never caused to be raised above the top of thestaple-rest 69.. That is to say, the detentlugs 35 at the forward end ofthe arm 4 engage with the -detentlugs 86 on the lever 5 to limit theupward movement of the latter under the action of the spring 93 wherebyto maintain the staple-driver 6 in position with its bottom edge beneaththe staple-rest 60 so that the staples are prevented from feeding intothe throat 40 in which the driver operates. Consequently, when theimplement is first loaded with staples the first operation of the lever5 will fail to apply a staple to the work, but during this operation theforemost staple in the series will be separated from the stick andcarried down in o pos t on to rest on the ledge 45 in reserve fordriving at the next operation of the lever. This positioning of a staplein reserve is accomplished by the engagement of the shoulder or abutment190 on the staple-driver 5 with the crossbar of the foremost staple inthe series, see Figs. 7 and 8. As the driver 6 moves downward, thecrossbar of the staple s will depress the forward upper end of thespring-latch 50 whereby to cause the staple to pass thereby and seat onthe ledge 45 as shown in Fig.8. Then, as the staple-driver 5 is raisedthe end of the latch 56 will spring forwardly into position to overliethe crossbar of the staple s to prevent it from rising upwardly or beingdisplaced from the ledge 45, see Fig. 9. After the staple-driver 5 hasbeen withdrawn to the upper end of its stroke, as shown in Fig. 7, thestaplepushed I will come into action under the tension of its spring 78to slide the whole series of staples forwardly until the foremost onebrings up against the rearward face of the driver. During this forwardfeeding of the staples in the series the legs of the foremost staplewill act against the staple s on the ledge 55 to feed it off therefromand into the throat 40 beneath the lower edge of the driver 6. Now, atthe next downward stroke of the lever 5 the staple-driver will engagethe top of the staple s in the throat 40 to drive it into the work,indicated at W in Fig. 8, to cause the ends of its legs to be clinchedon the under side thereof by means of the clincher- During this latterdriving action another staple s will be detached from the strip andcarried down onto the ledge 45 so that .aftereach staple is driven andthe driver raised to its uppermost position, a fresh staple will be fedforwardly off from the ledge 45 and into the-throat 46. In this way theimplement may be operated to apply staples to the work continuously; itbeing preferable to load the magazine-arm 4 with a fresh supply ofstaples before the last remaining one is applied to the work. Theoperator may observe the progress of the feeding action of the staplesthrough the windows 36 in the sides of the arm 4 so that when the laststaple in the strip or stick approaches the end of the arm,-a new supplymay be inserted into the magazine before the initial supply isexhausted. In this way the implement may be maintained in condition forapplying a staple at thefirst operation of the driving-lever 5 withoutnecessitating an idle stroke of the driver to sever a staple from thestick and advance it to reserve position on the ledge 45.

Due to the-novel form of the present stapledriving mechanism, insuranceis provided against driving one staple before another has been ejectedfrom the machine. Stated another way, with the present construction ofthe implement it is impossible to drive one staple on top of anothershould the first staple operated upon remain in the machine due to apartial or incomplete stroke of th staple-driver. This provision insuresagainst the chance of clogging the machine by driving one staple on topof another and thereby cause injury to the mechanism.

It has been explained that the essential parts of the implement areassembled by simply sliding them into place to effect a properengagement therebetween, the particular form of construction of theimplement thus providing for economy in its manufacture and alsofacility and convenience in disassembling the parts for repair orreplacement. In disassembling the parts, the driving-lever'5 may beremoved by merely pressing the reduced end 94 of the spring 93downwardly through the slot 89 at its rearward end to release it fromthe edge of the slot, this being readily accomplished by using any sharpinstrument. With the spring 93 released from the slot 89 the lever 5 maybe drawn forwardly to disengage its detent-lugs 86 from the lugs 35 atthe forward end of the arm 4 so that it can be lifted off therefrom. Theguard 11 then may be removed from the arm 4 and the latter disconnectedfrom its pivot lugs 38 by pressing its rearward end downwardly againstthe tension of the spring 25. The staple-rest 60 may be removed bywithdrawing the single stud 43 which also releases the block 39.Thereafter the rod 55 may be drawn forwardly to release it from itsbearing 25 at the end of the arm 4. Then, should it be necessary, theelements of the staple-pusher 1 may be slid off from the rearward end ofthe rod. Thus, it will be observed that the present improved form ofconstruction provides for the greatest facility and expedition inassembling the parts during manufacture of the implement or indisassembling them for their repair or replacement.

While the improved implement is herein shown and described as embodiedin a preferred form of construction, it is to be understood thatmodifications may be made in the structure and arrangement of its partswithout departing from the spirit or scope of the invention. Therefore,

without limiting myself-in this respect, I claim:

1. In a fastener-applying implement, a base,

standards on said base formed with laterallyprojecting lugs, achannel-shaped magazine-arm for containing the fasteners formed withnotches in its opposite sides for engaging with the lugs on thestandards, a spring acting between the base and the arm to maintain thenotches in engagement with the lugs to pivotally mount the arm on thestandards, a lever pivoted to the arm, a driver mounted on the lever forreciprocation relative to the arm, and means within the magazine-arm forfeeding the fasteners to position them beneath the driver.

2. In a fastener-applying implement, a base, parallel standards risingfrom the base and formed with lugs projecting laterally therefrom withrounded faces on their under sides, a channel-shaped magazine-arm forcontaining fasteners, said arm formed with tapered notches engageablewith the lugs on the standards, a spring between the base and arm forholding the arm in raised position with its notches engaged with thelugs on the standards to pivotally connect the arm with the base, alever pivoted to the magazine-arm, a driver mounted on the lever forreciprocation relative to the arm, a spring between the arm and thelever for normally maintaining the latter in raised position, and meanswithin the arm for feeding fasteners to deliver them to the driver.

3. In a fastener-applying implement, a base, a channel-shapedmagazine-arm for containing fasteners, said arm provided with a throatat its forward end and formed with laterally-projecting lugs at itssides, means for pivotally mounting the magazine-arm above the base,resilient means for maintaining the arm in raised position above thebase, a lever of inverted channel-shap-e formed with notches at itsrearward end engageable with the projecting lugs on the sides of themagazinearm to pivotally connect the lever therewith, a spring betweenthe arm and the lever for normally holding the latter in raised positionabove the arm, said spring acting to maintain the notches at the end ofthe lever in engagement with the lugs on the arm, a driver carried bythe lever for reciprocation in the throat at the end of the arm, andmeans within the arm for feeding the fasteners into position to bedriven by the driver.

4. In a fastener-applying implement, a base, a channel-shapedmagazine-arm provided with a vertical throat at its forward end andlaterallyprojecting lugs adjacent its rearward end, a lever of invertedchannel-shape straddling the magazine-arm and formed with taperednotches at its rearward end engaging the lugs on the sides of the arm, abow-shaped spring arranged between the arm and the lever for normallyholding the latter in raised position on the arm, the end of said springengaging the lever for holding its notches in engagement with the lugson the side of the arm, a driver carried by the lever for reciprocationin the throat of the arm, and means for feeding the fasteners in the armto position them beneath the driver.

5. In a fastener-applying implement, a base, a channel-shapedmagazine-arm pivoted above said base, said arm formed with a throat atits forward end and laterally-projecting lugs adjacent its rearward end,a lever of inverted channel shape arranged with its sides straddling thesides of the arm and formed at its rearward end with ii-shaped notchesengaging the lugs on the arm, said lever having a slot in its upperwall, a driverbiade mounted at the forward end of the lever zine-arm forfeeding and depending therefrom for reciprocation in the throat of thearm, a bow-shaped spring located between the top Wall of the lever andthe arm for normally holding the lever in raised position, said springhaving its rearward end engaging the edge of the slot in the lever tomaintain the notches in the latter in engagement with the lugs on thearm, and means for feeding fasteners forwardly in the arm 6. Animplement of the type indicated comprising a base, parallel standards onthe base provided with laterally-projecting lugs, a magazine-arm forcontaining a supply of fasteners, said arm formed with notches forengaging the lugs on the standards and having jecting lugs on its sides,resilient means between the base and arm for maintaining the notches inthe arm in engagement with the lugs on the standards to pivotally mountthe arm above the base, a lever having notches in its end engageabiewith the lugs on the arm for pivotally connecting the lever thereto, aspring between the arm and the lever acting to maintain the notches inthe lever in engagement with the lugs on the arm, a driver at theforward end of the lever reciprocable relative to the arm for drivingthe staples therefrom, and means within the magathe staples to thedriver.

'7. A device of the type indicated comprising a .base, a channel-shapedmagazine-arm pivoted above the base, a rest extending longitudinallywithin the arm for supporting the staples in straddled relation thereon,a plate-like guard seated on the sides of the arm in spaced relationabove the rest for preventing the staples from rising up on the rest, alever pivoted to the arm, a driver mounted on the lever forreciprocation relative to the arm, and a spring mounted between theguard and the lever for holding the guard seated on the arm and normallymaintaining the lever in raised relation to the arm.

8. A device of the type'indicated comprising a base, a channel-shapedmagazinearm pivoted above the base, a rest extending longitudinallywithin the arm in spaced relation to the sides thereof to adapt staplesto be straddled thereacross, a guard seated on the sides of the armoverlying the rest in spaced relation thereto, a lever pivoted to thearm, a spring bearing against the guard to hold it seated on the arm andacting against the lever to normally maintain it in raised relation tothe arm, a staple-driver reciprocable by said lever relative to the arm,and means for feeding the staples forwardly in the magazine to deliverthem to the staple-driver.

9. A device of the type indicated comprising a base, a, channel-shapedmagazine-arm pivoted above the base, a plate-like rest extendinglongitudinally within the arm in spaced relation to the sides of thelatter, means for mounting the rest at the forward and rearward ends ofthe arm to adapt it to support staples straddled thereacross, aplate-like guard seated on the sides of the arm overlying the rest inspaced relation thereto, a lever pivoted to the arm, a spring betweenthe lever and the guard for holding the latter seated on the arm andnormally maintaining the lever in elevated position with respectthereto, a staple-driver mounted at the forward end of the lever, andmeans for feeding the staples forwardly on the rest to deliver them tothe staple-driver.

10. In a staple-applying implement, a channelshaped magazine-arm havinga throat at its forward end, a relatively flat staple-rest extending todeliver them to the driven.

laterally-prolongitudinally within the arm, means for supporting saidrest at its forward and rearward ends to adapt it to mount a series ofstaples straddled thereacross, a plate-like guard overlying the sides ofthe arm in spaced relation above the staplerest, a spring bearingagainst the guard to hold it in positionon the arm andengaging the leverto normally maintain itelevatedabove the arm, a staple-driver atthe'forward end of the lever, andmeansfor feeding the staples along therest to deliver them to the driver.

11. In adeviceof'the type indicated, a magazine-arm for containingasupply'of staple-s, arest extending longitudinally of the arm forsupport ing aseriesof staples thereon, a throat at the forwardend of thearm, a ledge extending laterally across the arm at the rear of thethroat and belowthe staple-rest, a spring-latch at the rear of the ledgeadapted to engage over the crossbar of a staple to retain the latter onthe: ledge after it is fed off from the rest, a driver having a bladereciproca-ble inthe. throat and provided with a shoulder extendingthereacross above. the blade forengaging the top of a staple fed fromthe rest to carry it down onto the ledge, and means for reciprocatingthe staple-driver in the throat at the .end of the arm.

12; In a device of the type indicated, a channelshaped magazine-armhaving a transverse Wall at its forward end, a staple-rest extendinglongitudinally within the. arm: in spaced, relation to thesidessthereoito adapt it to support a series of staples thereon; a,block at the forward end of the arm for supporting the end of the rest,said block located with its forward face spaced from the end wall of thearm to provide a throat therebetween and having a transverse ledge atthe rear of the throat with-a pocket adjacent thereto, a. springlatchseated in the pocket with its end overlying the ledge, astaple-driver'having a relatively narrow blade reclprocable in thethroat at the front of the block" and provided, with an overhangingshoulderoverlying'the ledge. on the block, and means-for reciprocatingthe staple-driver in the throat at the end of the arm.

133111 a device of the type indicated, a magazine-arm of substantiallychannel-shape having its forward end closed by a vertical wall, anelementiseated at the. forward end of the arm'with its face spacedfromthe forward wall thereof to provide a-vertical throat-and formed with atransverse ledge above the throat, a staple-rest extending from saidelement longitudinally of the arm to adapt it to support a series ofstaples straddled thereacross, a staple-driver having a blade adapted toslide in the throat between the forward wall of the arm and the front ofsaid element and formed with an overhanging shoulder above the bladeoverlying the ledge on the element to adapt it to engage a staple fedfrom the rest and carry it down onto the ledge, a spring-latch for maintaining the staple in place on the ledge, means for reciprocating thedriver in the throat of the arm-,: and means for feeding the staplesforwardly on the rest to cause them to be operated on by the drivertocarry the foremost staple down onto the ledge and thereafter feed itinto the throat to be' driven by the nextoperation of the stapledriver.

14; In a device of the type indicated, a magazine-arm of channel-shape,a staple-rest extending longitudinally within the arm to adapt it tosupport a series of staples straddled thereacross, a throat at theforward end of the arm for receiving the staples to adapt them to bedriven therethrough', a transverse ledge at the rear of the throat belowthe top of the rest, a spring-latch overlying the ledge, a staple-driverhaving a blade reciprocable in the throat at the end of the arm and ashoulder at its top for engagement with a staple fed from the rest tocarry the latter down onto the ledge, means for advancing the staples inthe arm to feed a staple resting on the ledge into the throat beneaththe staple-driver, and means forreciprocating the driver to cause ittocarry a staple down onto the ledge and concurrently drive the staplepreviously fed into the throat;

ARTHUR H. MAYNARD.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,879,987 May-hard Sept, 27, 19322,309,778 Maynard Feb. 2, 1943 2,309,779 Maynard Feb. 2, 1943 2,311,412Pankonian Feb. 16,1943 1,845,186 Raeburn Feb. 16, 1932 2,354,760Lindstrom Aug. 1, 1944

